EP4012496B1 - Dôme pour caméra de surveillance - Google Patents

Dôme pour caméra de surveillance Download PDF

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Publication number
EP4012496B1
EP4012496B1 EP20213447.4A EP20213447A EP4012496B1 EP 4012496 B1 EP4012496 B1 EP 4012496B1 EP 20213447 A EP20213447 A EP 20213447A EP 4012496 B1 EP4012496 B1 EP 4012496B1
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EP
European Patent Office
Prior art keywords
dome
angle
plane
transition
camera
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20213447.4A
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German (de)
English (en)
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EP4012496C0 (fr
EP4012496A1 (fr
Inventor
Ulf Lundberg
Philipp LILJEVALL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Axis AB
Original Assignee
Axis AB
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Filing date
Publication date
Application filed by Axis AB filed Critical Axis AB
Priority to EP20213447.4A priority Critical patent/EP4012496B1/fr
Priority to KR1020210154420A priority patent/KR102534130B1/ko
Priority to US17/533,160 priority patent/US11595552B2/en
Priority to CN202111516341.0A priority patent/CN114630023B/zh
Publication of EP4012496A1 publication Critical patent/EP4012496A1/fr
Application granted granted Critical
Publication of EP4012496B1 publication Critical patent/EP4012496B1/fr
Publication of EP4012496C0 publication Critical patent/EP4012496C0/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/51—Housings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19617—Surveillance camera constructional details
    • G08B13/19619—Details of casing
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19617—Surveillance camera constructional details
    • G08B13/1963—Arrangements allowing camera rotation to change view, e.g. pivoting camera, pan-tilt and zoom [PTZ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof

Definitions

  • the present invention relates to a dome for a monitoring camera, such as for a surveillance camera.
  • the dome has the dual purpose of providing a weather-protected housing for the camera arranged inside the dome, while enabling acquisition of images through the dome. Portions of the dome through which the camera collects images will have to have an adequate transparency in the wavelength regions used during the acquisition. In most applications this corresponds to a visually transparent dome, yet if the wavelength region is near infrared (NIR) or infrared, or of another wavelength region outside of the visual spectrum the dome could be visually opaque.
  • NIR near infrared
  • infrared or of another wavelength region outside of the visual spectrum the dome could be visually opaque.
  • a material used for the dome could be tinted, coated or treated in other ways to obstruct view into the camera, since such obstruction would render it more difficult for an individual to see a current direction of the camera arranged therein (thus rendering it more difficult to avoid being imaged by the camera).
  • domes as compared to flat windows, are the most common design, having the advantage of a uniform distortion provided that an optical center of the camera is situated in the center of the spherical dome, such that the optical conditions are equal irrespective of a current orientation of the camera.
  • the optical requirements of the dome both in terms of transparency and shape, makes it a comparatively expensive component. Furthermore, there is an issue in that a dome will obviously end somewhere, and at and near the edges of the dome there will be more severe optical distortions. A way around those optical distortions may be to use a more complex design of the dome, often resulting in a more complex manufacturing process, i.e. adding to the performance of the dome while also adding to the cost of it.
  • the manufacturing could involve a more complex moulding process with an increased number of mould parts, and/or a post-moulding step, such as fusion of two or more dome parts to form the final dome.
  • the present invention aims at alleviating some of the problems of the existing domes by providing a uniquely shaped dome, enabling both an improved field of view and a simplified manufacturing process, as compared to present domes having such an improved field of view.
  • the present invention relates to a dome for a surveillance camera, according to claim 1.
  • the dome comprises an at least partially transparent spherical portion, a front transition portion, a back transition portion, and lateral transition portions connecting the back transition portion and the front transition portion on either side of the dome. Furthermore, all transition portions extend from the spherical portion to a common perimeter plane and a tangent to the spherical portion where it connects to the front transition portion has an angle ⁇ > 0°relative to a normal to the perimeter plane, as measured in a symmetry plane, and a tangent to the spherical portion where it connects to the back transition portion has an angle ⁇ relative to a normal to the perimeter plane, as measured in the same plane and the same direction as the angle ⁇ .
  • the dome is characterized in that the angle ⁇ is equal to or larger than the angle ⁇ , and neither the back transition portion nor the front transition portion has an inclination exceeding the angle ⁇ .
  • the inventive design of the dome will enable an adequate view for a camera arranged inside a dome, while enabling a facilitated manufacturing procedure.
  • a radial center of the spherical portion is shifted in relation to the perimeter plane, in the direction of the spherical portion. Having the radial center shifted in relation to the perimeter plane offers room for a camera to be arranged in or close to the radial center and thereby a view by the camera through the partially transparent spherical portion will be consistent over a range of different orientations of the camera.
  • An angle of a tangent to the back transition portion is equal to or larger than ⁇ over the entire transition portion.
  • the back portion connects to the spherical portion in the tangential direction, thus providing a smooth seamless transition from the spherical shape to a straight shape.
  • This shape is not only visually appealing, it may also better transfer a load (such as an impact) from the spherical portion down to the perimeter portion without generating a concentration of force in the way that, e.g., a sharper bend or a defined edge would.
  • every outer surface of the dome is visible when the dome is observed in a projection angle ⁇ , which is another manner of expressing that there are no undercut portions in the dome, meaning that removing a finished article from a mould may be readily performed.
  • the front transition portion, the back transition portion, and the lateral transition portions all extend down to a circular perimeter in the perimeter plane.
  • the circular shape will facilitate mounting and sealing to a base, to rotate the dome in relation to a base, and to achieve a symmetrical design.
  • the lateral transition portions follow the same angle as the back transition portion in their connection to the spherical portion.
  • the front transition portion follows an angle ⁇ in relation to a tangent to the spherical portion where it connects to the front transition portion, where ⁇ is equal to or greater than 90° as measured in the same plane and direction as ⁇ and ⁇ . In this way there is less risk of the front transition portion obscuring the view of a camera arranged inside the dome. While the back transition portions and the lateral transition portions may preferably have a like shape to increase symmetry in the design, the front transition portion will have a shape following other design rules where the functionality is paramount.
  • the angle ⁇ exceeds 90°, so as to accommodate an extended field of view.
  • the back transition portion and the lateral transition portions define a frustoconical shape, again emphasizing the aspect and importance of symmetry in a monitoring camera application.
  • the inventive dome of which an embodiment is shown in Fig. 1 , has a shape facilitating an adequate view for a camera being mounted inside the dome, as well as a simplified moulding process. It may be noted that even though Fig. 1 illustrates one embodiment, the following text will contain information regarding parameters that may be altered for the realization of the further embodiments.
  • the dome 100 has a front side 102 and a back side 104, and a shape being symmetrical around a central vertical plane (the plane depicted in Fig. 2 ).
  • the dome 100 is designed to house a camera (not shown), in a fashion normal for dome cameras, and areas of the dome through which the camera is expected to acquire an image are spherical and transparent (for the wavelength region to be captured by the camera, normally visual and near-infrared).
  • the dome extends down to a perimeter plane 106, where it will connect to a base during assembly.
  • the perimeter 108 is in the illustrated embodiment circular, which is practical since the dome will be designed to rotate with the camera, and since it will increase the symmetry of the dome 100 when viewed from different angles.
  • the front side 102 forms part of a spherical shape 110 extending to the back side 104 where a back transition portion 112 connects the spherical shape 110 with the perimeter, and the back transition portion connects to lateral transition portions 114 on either side thereof, back to the front side. as well as provides a transition to the perimeter plane 106.
  • a front transition 116 region having a different shape from the rest of the transition (the back transition portion 112 and the lateral transition portion 114), for enabling a full camera field of view.
  • the dome may be formed in a single piece or from multiple parts in a multi-component moulding process or in a multi-stage moulding process.
  • Fig. 1 basically is a line drawing illustrating the shape of the dome 100 in the aforementioned symmetry plane.
  • the symmetry plane could be translated to a center plane of the spherical portion.
  • the same reference numerals are used to denote corresponding parts, even though they are not given the exact name (e.g. instead of a "region” or “area” corresponding numerals are used to refer to "segments" in Fig. 2 , it being a section rather than a perspective view).
  • the dome is construed by three operational segments.
  • the first operational segment is a circular arc 110, corresponding to an intermediate segment in later embodiments.
  • This circular arc 110 will enable for a camera having its imaging function in the center of the arc (as is the usual position in a dome camera) to maintain an undistorted (or at least equally distorted) view over a tilt angle range.
  • a front end of the circular arc there is a front transition segment 116 extending from the one end of the circular arc 110 down to a perimeter 108, and in the back end of the circular arc there is a back transition segment 112 extending from the other end of the circular arc to the perimeter 108, wherein the perimeter is situated in a perimeter plane.
  • the perimeter plane which is worth mentioning, is only an abstraction for better understanding of the dome shape.
  • a first tangent T1 to the circular arc 110 may be defined where it connects with the front transition segment 116 and a second tangent T2 to the circular arc 110 may be defined where it connects to the back transition segment 112.
  • the first and the second tangent T1 and T2 are both arranged at an angle in relation to the perimeter plane and are inclined in the same direction in relation to a normal of the perimeter plane.
  • the effect of the inclination is that a camera arranged inside the dome will be able to obtain a field of view extending past a horizontal line (in an embodiment where the perimeter plane is a horizontal plane - such as a ceiling) when looking through the front of the dome.
  • Being able to obtain this inclination of the first tangent is an effect of that a geometrical center C of the circular arc segment (i.e. the center of the circle of which the arc segment form a part) is offset from the perimeter plane 106, in the direction of the arc segment 110.
  • the first tangent will be inclined at an angle ⁇ in relation to a normal N1 of the perimeter plane, and the second tangent will be inclined at an angle ⁇ in relation to the same normal N2 (same in the meaning "parallel to N1").
  • these angles may be the same, OR, the angle ⁇ may be greater than the angle ⁇ .
  • no part of the front or back transition segment may be inclined at an angle greater than the angle ⁇ as measured in the same plane.
  • ⁇ and ⁇ may and will vary for different sections, if at all present (consider a small section close to the perimeter of the dome, parallel to the symmetry plane and essentially only comprising a cut from the lateral connection portion, i.e. a frustoconically shaped section).
  • ⁇ and ⁇ may and will vary for different sections, if at all present (consider a small section close to the perimeter of the dome, parallel to the symmetry plane and essentially only comprising a cut from the lateral connection portion, i.e. a frustoconically shaped section).
  • There are two straightforward ways of defining angles and use of the symmetry plane and sections parallel to the symmetry plane may be appropriate when discussion the properties of the spherical portion at the front of the dome etc.
  • radial planes sections in planes extending through a centerline of the dome, orthogonal to the perimeter plane, referred to as "radial planes" in the following.
  • the centerline extends through the geometrical center C, orthogonal to the perimeter plane.
  • these radial planes there is still the general conditions of not generating any undercut portions to fulfill, but as seen in the drawings this is less of an issue to achieve, mainly since the spherical portions and the transitional portions will not have to be optimized in regard of a camera view through the dome.
  • the back transition segment 112 connects to the arc segment in the angle of the second tangent T2, such as to provide a continuous transition where any effects of load focusing are minimized (as compared to a situation where the two segments meet at a more defined bend.
  • Fig. 2 also includes an angle ⁇ , which indicated an angle of a portion of the front transition segment in relation to the tangent T1. It is preferred that the angle ⁇ is equal to or exceeds 90°, i.e., that the aforementioned portion has an inclination corresponds to a prolonged radius extending through the center C or is even further inclined. In this way the field of view of a camera arranged inside the dome may be accounted for, such that the front transition segment 116 does not obscure the view. This feature may be beneficial for several various setups (dome and camera combinations) but it is not an essential feature for the invention as such.
  • the shape of the front transition segment should merely provide a transition between the spherical portion and the perimeter portion, and in many embodiments preferably to the circular perimeter.
  • the shape illustrated in the drawings of the present application is also governed by the wish to maximize the rotational symmetry to the greatest possible extent, meaning that the part of the front transition segment closest to the perimeter portion should have a shape similar to that of the back transition portion in the corresponding position (e.g. following the same angle in a radial plane).
  • the shape of the aforementioned portion is preferably set by the field of view of the camera, and since the same is true for the transition point (i.e. this point is preferably set by the field of view of the camera) between the spherical portion to the front transitional portion, the condition that angle ⁇ is equal to or exceeds 90° follows.
  • dome shape in relation to the moulding is an added bonus in having a designated front and a designated back, in that the injection points (essentially the moulding process) may be optimized to provide excellent optical qualities in the front of the dome while it will be less important for other portions of the dome.
  • Fig. 3 is a sectional view similar to Fig. 2 , yet of a more complete embodiment with a schematic camera arranged within the dome. Apart from the components of Fig. 2 , Fig. 3 also includes a camera 118.
  • the camera 118 includes imaging optics, obviously, and the beams 120 and 122 indicate how the field of view may range, e.g., as an effect of different zoom settings.
  • a camera may pan and tilt freely below a static dome, in which case it is imperative that the dome is fully symmetric, which usually corresponds to the dome having a semispherical shape.
  • the camera 118 will only by allowed to tilt in relation to the dome 102 (i.e. to move in the plane illustrated in Fig. 2 ) and in most embodiments it will not be allowed to pan (i.e. not rotate in the horizontal direction) at least not to any major extent.
  • the dome will move along with the camera, such that the camera does not pan in relation to the dome.
  • the intermediate segment 110 will only need to have a defined shape in a small area extending on each side of a centerline.
  • this "small area” will be defined by the field of view of a camera 118 (may also be defined as the view angle) arranged in the dome, and in a practical application it will be defined by the largest view angle for a camera inside the dome, indicated by the cone 122 in Fig. 3 .
  • the intermediate segment 110 follows a circular arc in one direction, and due to the desire for symmetry and minimized and consistent image distortion the intermediate section will also follow an identical circular arc (a circular arc with the same radius) in all other directions, i.e. the intermediate portion may be a cutout of a sphere. This is shown in Fig. 4 and explains the shape of the intermediate segment 110 in all dimensions.
  • Fig. 4 also shows the respective shape of the back 112 and front 116 transition portions. These shapes are of less importance since the design is intended to prevent the camera view from accessing these areas (meaning that distortion in terms of refraction is not a factor to consider).
  • the main criterion is still that there should be no undercut portions, i.e. all surfaces should be visible in a projection along the angle ⁇ (or at least between ⁇ and ⁇ ) in a symmetry plane (mirror plane) of the dome.
  • the front transition portion 116 is shaped not to interfere with the view of the camera, i.e. it slopes continuously towards the perimeter 106.
  • the back transition portion 112 has a frustoconical shape, e.g., extending in the direction of the second tangent, resulting in a smooth transition between the portions.
  • the perimeter 106 will form a circle, for increased symmetry, meaning that both the front and the back transition segment/portion will extend from the intermediate segment/portion to different parts of the same circular perimeter 106.
  • a circular shape of the perimeter is not an essential feature, but there are advantages relating to how it simplifies rotational motion in relation to a base on which the dome may be arranged, apart from the increased symmetry.
  • a further criterion is related to the particular use for which the dome is intended, namely surveillance.
  • a dome camera there is an added benefit if the orientation of a camera inside the dome is obscured. Since the present dome is non-symmetrical in that the front of the dome differs from the back and the lateral sides, the front of the dome - and therefor a probable orientation of the camera - may become more obvious, which is clearly visible in Fig. 1 .
  • the shape of the back transition segment/portion may for this reason be mimicked all around the camera in the lateral transition portions, that is, in every portion not being the front transition (nor the intermediate segment), which is also shown in Fig. 1 (again, see Fig. 1 ). This would correspond to the front transition portions and the lateral transition portions having the same shape (such as the same angle in the most straightforward embodiment) when viewed in their respective radial plane.
  • a viewing window In the front of the dome, as seen in Fig. 1 , where the front transition portion connects the intermediate segment to the perimeter and to the back transition segment (or the area shaped as the back transition segment) something that could be called a viewing window is formed.
  • the portion where the front transition segment connects to the perimeter has been described, yet also the shape of the lateral sides of this window will be defined by the expected field of view of a camera arranged within the dome. More specifically, and as shown in, e.g. Fig. 1 , these sides will be slanted outwardly so as to minimize the risk of obscuring portions of the field of view.
  • the entire dome as shown and defined thus far, may readily be formed in one piece in a two-piece mould, with facilitated demoulding.
  • Fig. 5 illustrates an exploded view of a dome according to another embodiment of the present invention.
  • This embodiment too, may be formed in a two-part mould, yet it will be a multicomponent moulding.
  • the finished dome will consist of three different parts of which two may be arranged in the mould prior to injecting the material for the transparent portion.
  • the two side parts 124 are essentially visually opaque but IR-transparent parts that will allow IR-radiation from IR-illumination sources arranged within the dome to illuminate the field of view of the camera. It is obvious from the Fig. 5 that these two parts also include portions of the spherical portion. Further parts may be added in a similar manner, required. All parts may be formed from the same base material, wherein additives define the properties of the different parts.
  • the two side parts may be formed in a first or second stage of a two-stage moulding process as the dome is fabricated, which reduces the handling of separate components at the cost of a slightly more complex, yet still straightforward, moulding process.
  • the materials used in the different parts will have to be compatible so as to fuse together during the moulding process, to the extent necessary. In the most straightforward example, all components are made from the same base material, polycarbonate plastic, while additives give the desired properties. Any material used for camera domes today may be a viable option for the present invention, polycarbonate plastic, acrylic plastic, etc. and apart from that the material used is not an essential part of the present invention per se.
  • the material for the spherical portion will have to be transparent in the relevant wavelength region, to be a viable choice, and mouldable in order to obtain the full advantages of the shape.
  • Injection moulding is one possible method, preferred for the illustrated embodiments of the present invention, but compression moulding, blow moulding or other moulding methods are not ruled out, since they all could include the demoulding step.
  • the side parts may be prefabricated and arranged in the mould. Following that, the mould is closed and the material of the transparent portion is injected. The moulding process will fuse all parts together to a single component, which will simplify assembly of the final product and improve sealing properties for the same.
  • the side parts 124 may be eliminated from the process as individual components, meaning that the entire dome could be moulded in a single stage and of a single material. Furthermore, specific properties of different portions of the dome may be achieved during post-moulding processes, such as coating, painting, abrasion, etching, etc.
  • Fig. 6 is a schematic view of a rudimentary version of a dome not covered by of the invention. It basically consists of two geometrical shapes; a sphere arranged at one end of a cylinder, both shapes having the same diameter. The cylinder is cut in a slanted angle along a plane. As compared to the more refined embodiments this simplified one will have a more asymmetrical shape and its perimeter will not be circular.
  • Fig. 7 the cylinder of Fig. 6 is replaced by a frustoconical portion as a further intermediate evolution from the general idea towards a valid product.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Studio Devices (AREA)

Claims (6)

  1. Dôme (100) pour caméra de surveillance, ledit dôme comprenant une section sphérique au moins partiellement transparente (110), une section de transition avant (116), une section de transition arrière (112), et des sections de transition latérales (114) connectant la section de transition arrière et la section de transition avant de tous les côtés du dôme, toutes les sections de transition s'étendant dans un plan périmétrique circulaire commun (106) et :
    une tangente (T1) de la section sphérique où elle se connecte à la section de transition avant décrivant un angle α > 0° par rapport à une normale (N1) du plan périmétrique, telle que mesurée dans un plan de symétrie et dans un sens détourné d'un centre radial (C) de la section sphérique, et
    une tangente (T2) de la section sphérique où elle se connecte à la section de transition arrière décrivant un angle β par rapport à une normale (N2) du plan périmétrique, telle que mesurée dans le même plan et dans le même sens que l'angle α,
    l'angle β étant supérieur ou égal à l'angle α,
    caractérisé en ce qu'un angle d'une tangente de la section de transition arrière (112) est supérieur ou égal à β sur toute la section de transition et en ce que les sections de transition latérales (114) suivent le même angle que la section de transition arrière dans leur connexion avec la section sphérique (110), de même que la même hauteur par rapport au plan périmétrique (106) de manière à définir une forme frustoconique.
  2. Dôme selon l'une quelconque des revendications précédentes, dans lequel un centre radial de la section sphérique est décalé par rapport au plan périmétrique dans le sens de la section sphérique.
  3. Dôme selon l'une quelconque des revendications précédentes, dans lequel la section de transition arrière (112) se connecte à la section sphérique dans le sens tangentiel.
  4. Dôme selon l'une quelconque des revendications précédentes, dans lequel chaque surface extérieure du dôme est visible lorsque le dôme est observé dans un angle de projection α.
  5. Dôme selon l'une quelconque des revendications précédentes, dans lequel la section de transition avant décrit un angle θ par rapport à une tangente de la section sphérique où elle se connecte à la section de transition avant, θ étant supérieur ou égal à 90°, tel que mesuré dans le même plan et sens que α et β.
  6. Dôme selon la revendication 5, dans lequel l'angle θ excède 90° de manière à accommoder un champ de vision étendu d'une caméra disposée à l'intérieur du dôme.
EP20213447.4A 2020-12-11 2020-12-11 Dôme pour caméra de surveillance Active EP4012496B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20213447.4A EP4012496B1 (fr) 2020-12-11 2020-12-11 Dôme pour caméra de surveillance
KR1020210154420A KR102534130B1 (ko) 2020-12-11 2021-11-11 감시 카메라용 돔
US17/533,160 US11595552B2 (en) 2020-12-11 2021-11-23 Dome for surveillance camera
CN202111516341.0A CN114630023B (zh) 2020-12-11 2021-12-06 用于监视摄像机的顶罩

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20213447.4A EP4012496B1 (fr) 2020-12-11 2020-12-11 Dôme pour caméra de surveillance

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EP4012496A1 EP4012496A1 (fr) 2022-06-15
EP4012496B1 true EP4012496B1 (fr) 2024-01-24
EP4012496C0 EP4012496C0 (fr) 2024-01-24

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US (1) US11595552B2 (fr)
EP (1) EP4012496B1 (fr)
KR (1) KR102534130B1 (fr)
CN (1) CN114630023B (fr)

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US20020060745A1 (en) 2000-07-28 2002-05-23 Philips Electronics North America Corporation Outdoor dome
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US20220191351A1 (en) 2022-06-16
CN114630023B (zh) 2024-01-12
EP4012496C0 (fr) 2024-01-24
CN114630023A (zh) 2022-06-14
KR102534130B1 (ko) 2023-05-17
EP4012496A1 (fr) 2022-06-15
US11595552B2 (en) 2023-02-28

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